CN201983307U

CN201983307U - Microwave oven

Info

Publication number: CN201983307U
Application number: CN2011201119823U
Authority: CN
Inventors: 梁伟国
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-04-16
Filing date: 2011-04-16
Publication date: 2011-09-21
Anticipated expiration: 2021-04-16

Abstract

The utility model relates to a microwave oven comprising a halfwave voltage-multiplying circuit, which comprises a high-tension transformer and a magnetron. The high-tension transformer comprises a skeleton, a primary winding, a secondary winding and a filament winding; and at least one voltage connection-disconnection controller is arranged in a current loop formed by the secondary winding and the magnetron. The microwave oven is reasonably designed, the voltage connection-disconnection controller is used to control the connection or disconnection phase position of a working circuit of the secondary winding so as to change the output of the magnetron and lead the output power factors of the microwave oven to be maximized as far as possible.

Description

Micro-wave oven

Technical field

The utility model relates to a kind of micro-wave oven that contains the half-wave voltage-multiplying circuit.

Background technology

About secondary general the output 2000VAC of existing high voltage transformer of microwave oven; and secondary windings one end is by contacting ground connection with transformer framework; therefore have a half-wave voltage-multiplying circuit in the secondary back of micro-wave oven; high-tension transformer charges to the electric capacity in the half-wave voltage-multiplying circuit earlier in the half period of a sine wave; output when utilizing other half reversal periods of high-tension transformer then; the voltage that stack had originally charged about electric 4000VAC of electric capacity composition makes its work to magnetron; for the high temperature that prevents high-tension transformer causes security incidents such as winding is on fire; generally between high-tension transformer secondary windings and high-voltage capacitance the series connection high-voltage fuse component; in when, image height taking place pressing diode breakdown etc. unusual when; the electric current of secondary windings surpasses the current limit of high-voltage fuse, and fuse will burn to play a protective role.Use the micro-wave oven of this high-tension transformer, its power factor does not reach maximum.

Summary of the invention

Therefore, the purpose of this utility model is to provide a kind of micro-wave oven that can improve power factor greatly.

Above-mentioned purpose adopts following technical proposals to realize.

A kind of micro-wave oven comprises high-tension transformer and magnetron, and high-tension transformer comprises skeleton, elementary winding, secondary windings and Filament Winding again, is provided with a voltage on-off controller at least in the current loop that described secondary windings and magnetron are formed.

Technique scheme can be done following further perfect.

Described voltage on-off controller is a bilateral diode.

Or the combination that is two diodes of described voltage on-off controller, two diode polarity are parallel in the current loop on the contrary jointly.

Or described voltage break-make device is single controllable silicon.

Or described voltage break-make device is the combinations of two silicon controlleds, and two controllable silicon polarity are parallel in the current loop on the contrary jointly.

Or described voltage break-make device is a high-voltage diode.

Be provided with phase shifter in the current loop that described Filament Winding and magnetron are formed.

The utility model is reasonable in design, and the phase place by control secondary windings operating circuit conducting of voltage on-off controller or disconnection is used for changing the output of magnetron, makes the output power factor of micro-wave oven reach maximum as far as possible.

Description of drawings

Fig. 1 is the electric diagram of embodiment 1.

Fig. 2 is the electric diagram of embodiment 2.

Fig. 3 is the electric diagram of embodiment 3.

Fig. 4 is the electric diagram of embodiment 4.

Fig. 5 is the electric diagram of embodiment 5.

Fig. 6 is the electric diagram of embodiment 6.

Fig. 7 is the electric diagram of embodiment 7.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

Embodiment 1, in conjunction with Fig. 1, a kind of micro-wave oven, comprise high-tension transformer 1, high-voltage fuse 10, high-voltage capacitance 11, high-voltage diode 8 and magnetron 9, high-tension transformer 1 comprises elementary winding 2 again, secondary windings 3, Filament Winding 4, elementary winding has input 5,6,7, Filament Winding 4 is connected with the cathodic electricity of magnetron 9, secondary windings 3, high-voltage fuse 10, high-voltage capacitance 11, the connected mode of high-voltage diode 8 and magnetron 9 adopts existing half-wave multiplication of voltage mode, between high-voltage fuse 10 and high-voltage capacitance 11, increase bilateral diode 12, control the break-make angle in secondary windings 3 work loops by the threshold voltage of bilateral diode 12, make the power factor of micro-wave oven make moderate progress.

Embodiment 2, and in conjunction with Fig. 2, embodiment 2 is that with the difference of embodiment 1 elementary winding 2 has only input 5 and input 7.

Embodiment 3, in conjunction with Fig. 3, embodiment 3 is that with the difference of embodiment 1 voltage on-off controller 13 adopts high-voltage diode 14 and controllable diode 15, and high-voltage diode 14 is opposite with controllable diode 15 polarity, and is parallel to jointly between high-voltage fuse 10 and the high-voltage capacitance 11.

Embodiment 4, and in conjunction with Fig. 4, the difference of embodiment 4 and embodiment 1 is the location swap of high-voltage fuse 10 and bilateral diode 12.

Embodiment 5, and in conjunction with Fig. 5, the difference of embodiment 5 and embodiment 3 is that the control of voltage break-make only is made up of single high-voltage diode 14, utilize the breakdown reverse voltage of high-voltage diode 14 to control the angle of flow of one of them half-wave.

Embodiment 6, and in conjunction with Fig. 6, the difference of embodiment 6 and embodiment 5 is also to be provided with in the loop of Filament Winding 4 and is used for phase shifter 16 that the loop current of Filament Winding 4 is adjusted.

Embodiment 7, and in conjunction with Fig. 7, embodiment 7 is that with the difference of embodiment 3 high-voltage diode 14 and controllable diode 15 are series in the circuit as two independent on-off controllers.

The main effect of the bilateral diode in the foregoing description, controllable diode, kenetron, controllable silicon etc. is to control voltage power supply angle in the current loop of secondary windings and magnetron composition.Identical as for silicon controlled working method and principle with diode, the combination of single controllable silicon or a plurality of silicon controlled with all with the foregoing description in the mounting means of bilateral diode, diode the same.

In addition, the firing control for devices such as controllable diode is that prior art is no longer described here.

Claims

1. micro-wave oven, comprise high-tension transformer and magnetron, high-tension transformer comprises skeleton, elementary winding, secondary windings and Filament Winding again, it is characterized in that: be provided with a voltage on-off controller at least in the current loop that described secondary windings and magnetron are formed.

2. according to the described micro-wave oven of claim 1, it is characterized in that: described voltage on-off controller is a bilateral diode.

3. according to the described micro-wave oven of claim 1, it is characterized in that: described voltage on-off controller is the combination of two diodes, and two diode polarity are parallel in the current loop on the contrary jointly.

4. according to the described micro-wave oven of claim 1, it is characterized in that: described voltage break-make device is single controllable silicon.

5. according to the described micro-wave oven of claim 1, it is characterized in that: described voltage break-make device is two silicon controlled combinations, and two controllable silicon polarity are parallel in the current loop on the contrary jointly.

6. according to the described micro-wave oven of claim 1, it is characterized in that: described voltage break-make device is a high-voltage diode.

7. according to the described micro-wave oven of claim 1, it is characterized in that: be provided with phase shifter in the current loop that described Filament Winding and magnetron are formed.